In texting and internet lingo, the phrase “MB” typically means “My Bad.” It is used to confess to a fault or to apologize informally in discussions. For instance, if a person doesn't reply or provides wrong details, they could text “MB” to quickly say sorry. Sometimes also, “MB” might refer to “Megabyte” in technology or file sizes, but more often than not, “My Bad” is the more common definition. The definition can vary depending on the context and who is using the word. know more about mb mean in text